Bell curve

Hi, heres the situation
I am actually programming an asp.net project and need to insert an excel file for the following...
i am doing a standard bell curve for autism scores. I then need to have an input to overlay a vertical line function that will display at x= entered value (this will move a bar along the bell curve to display to the user where their score falls...
i have been doing multiple searches for generating a bell curve in excel, but all the "how-to's" I've found have been for pre2010 (the current platform I am running)
Can anyone help with this? I have no clue where to begin and have used excel a handful of times

Edit: I have added the supplied bell curve image